Road tool



1927 1 620 247 March D. M. WATTERS ROAD T001] Originai Filed Feb. 16,1922 2 Sheets-Sheet 1 %N mm Gite: "n40 DANIEL M. WATTERS March 8,1927.

D. M. WATTERS ROAD TOOL.

Original Filed Feb. 16, 1922 2 Sheets-$hee 2 gnovmtov DAN/1:1. M. WATTERS W Patented Mar. 8, 1927.

UNITED STATES PATENT OFFICE.

IDANIEL M. WA'ITERS, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO KILLEFERMANU- FACTURING COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OFCALI- I roanm.

I ROAD 'rooL.

Original application filed February 16, 1922, Serial No. 537,111.Divided and this application filed May 4, 1926. Serial No. 106,660.

Thisinvention relates to a road tool of the character employed in the socalled scarifying of roads provided with surfaces treated with oil,asphaltum or other substance that can be cut, and is a division of mypatent application, Serial No. 537,111, filed February 16, 1922.

An object of the invention is toprovide a tool of this description inwhich the cutting discs can be manually raised and lowcred very quicklyso as to avoid manholes, rails and other obstacles encountered in roadbuilding and repairing.

In order to properly scarify a road surface, that is to out off theridges of the surface so as to make said surface more nearly smooth, itis necessary to make frequent small adjustments of the discs relative tothe road surface so as to more or less follow the surface contour, asthe road may be crowned or there may be comparatively large unevensurfaces which it is not the function of the scarifier to remove. It isalso essential, for the reasons stated above, that it be possible toadjust the discs relative to the road surface by relatively greatmovements quickly executed.

A further object of this invention is to meet the conditions notedabove.

The accompanying drawings illustrate the invention:

Fig. 1 is a plan view of a road tool constructed in accordance with theprovisions of this invention.

Fig. 2 is a side elevation of Fig. 1. The parts are shown in solid linesin the positions they occupy when the frame is lowered relative to thewheels, and broken lines indicate the positions of the parts when theframe and its suspended discs are in raised position relative to thewheels.

Fig. 3 is an enlarged fragmental elevation mainly in section on'lineindicated by 33, Fig. 1.

Fig. 4, is an enlarged broken elevation, mainly in section on the lineindicated by 4-4, Fig. 1. i

Fig. 5 is an enlarged broken elevation, partly in section, from the lineindicated by 5-5, Fig. 1. j

The frame of the implement is indicated at 8 and said frame carrieshangers 9 provided with bearings 10 for the shafts 11, on which discs 12are mounted. The discs 12 'each side of the machine.

are shown in four series, in this instance, there being one series oneach shaft. The discs of the series on opposite sides of the frame arearranged at an angle to one another asis customary in this type of roadtool. At its forward end the frame 8 is provided with forwardlyprojecting arms 13 positioned above the level of the frame 8 andconnected therewith by standards 14. The arms are mounted cantileverwiseon the standards. To the forward ends of the membars 13 is securedmechanism 15 for raising and lowering the forward end of the frame 8.The mechanism 15 will not be described in detail herein as it is thesubject of the copen'ding patent application hereinbefore'referred to.

A yoke 86 is riveted at 37 to the members 13 and pivoted to the yoke at88 is a draft tongue 39 whereby the road tool is drawn over the surfacewhich is being operated upon.

All of the frame members 42 are extended rearwardly and are providedwith bearings 43 for crank axles 44, there being two bearings for eachaxle and two axles, one for Mounted on each pair of the members 42somewhat forwardly of the bearings 43 is a post comprising plates 45,451. The upper ends of the plates 45 constitute bearings 46 for thetrunnions 47 of a trunnion nut 48. The trunnion nut- 48 is engaged by ascrew provided with two sets of screw-threads 49, 50 respectively. Thescrew threads 49 are the reverse of the screw threads 50. The upper endof the screw is provided with a hand wheel 51 whereby the screw isturned. a

The screw-threads 5O engage a second trunnion nut 52 having itstrunnions 53 pivotally supporting one end of a pair of arms 55 which aresecured by a V-shaped bracket 56 to the crank 57 of one of the crankaxles.

Each of the crank axles is provided with a ground wheel 58, and the rearend of the frame 10'is thus independently and adjustably suspended atopposite sides of the lonso that the discs 12 will cut into the surfaceof the ridges in the road and thus level off said ridges. While it isnecessary to adjust the elevation of both ends of the frame 10 atintervals to produce the desired cutting of the road surface, shiftingof the front end need not be so speedily effected as the rear end. Byraising and lowering the rear end of the frame, not only will therearmost discs be raised -and lowered, but the foremost discs willlikewise be raised and lowered,

' though by a lesser distance than the rear end. Assuming that the handwheels 20, 51, have been adjusted to make the desired cut into theridges or uneven places of the road, and that because of the approach ofthe machine toward a man-hole it is necessary to raise the discs abovethe surface of the road, the operator will turn both hand wheels 51 tothe right. The screw threads 49 being left hand, the screws will riserelative to the frame so as to swing the arms 55 and cranks 57 upwardlyto raise the frame. Turning of the hand wheels 51 also causes thetrunnion nuts 52 to travel upwardly on the screws, because thescrew-threads en- 'gaged by them are right hand. This of course producesmore rapid swinging upwardly of the arms 55 and cranks 57 to effect theraising of the frame. As soon as the man-hole has been passed, the handwheels 51 will be turned to the left to effect lowering of the frame soas to swing the discs 12 into cutting relation with the surface of theroad.

The operator, by carefully observing the depth of cut made by theforward series of discs, can accurately operate either or both of thehand wheels 51 to make a deeper out with the rear series of discs inthat portion of the ridge which has just passed the forward series ofdiscs, so as to reduce the elevation of the ridges by a still greateramount.

These tools are of necessity relatively massive in construction and itis clear, therefore, that the frame elevating mechanisms should operateeasily and quickly to avoid the imposing of excessive strain upon theoperators, since frequent raising of the discs is necessary to clearroad obstructions such as manholes and because of working oncomparatively short stretches of road and also in cross leveling foradjusting to road inequalities.

Because of the provision of the members 13 and standards 14, the frontaxle can be turned to position at a right angle to the longitudinal axisof the machine, thus permitting the machine to be turned in a shortradius and consequently not requiring that the discs be raised ten ortwelve inches as would be necessary if a short turn could not be made.This is important since the machines operate about three-quarters of thetime on runs of but one or two blocks before turning.

It will be understood that a machine of this description is subjected toconsiderable vibration when in service. By provision of the raising andlowering mechanism described, the vibrations do not destroy theadjustment as has been experienced with the use of prior constructedlifting jacks designed for speedy raising and lowering of the discs.

I claim:

1. An implement of the character described comprising aframe, postsmounted on the frame and each provided with a trunnion nut, screwshaving upper and lower series of screw threads of reverse construction,said upper screw threads engaging the trunnion nuts, nuts engaging thelower screw threads, means to turn the screws, wheels shiftablyconnected with the frame, and means operable by movement of the lastmentioned nuts along the screws to elevate the frame relative to saidwheels.

2. An implement of the character described comprising a frame, an axleconnected with the frame, posts mounted on the frame and each providedwith a trunnion nut, screws provided respectively with series of threadsengaging the nuts and provided respectively with other series of threadsof reverse construction to the first mentioned series, nuts engagingsaid other series of threads, means to turn the screws, wheels shiftablyconnected with the frame and means operable by movement of the lastmentioned nuts along the screws to elevate the frame relative to saidwheels.

Signed at Los Angeles, Calif, this 21 day of April, 1926.

D NI L M- WA ER'S-

